condition mean min max ZT0-3 5057.25 5057.25 5057.25 ZT4-7 1843.8 1843.8 1843.8 ZT8-11 1693.9499999999998 1693.9499999999998 1693.9499999999998 ZT12-15 2425.0 2425.0 2425.0 ZT16-19 4624.5 4624.5 4624.5 ZT20-23 4607.25 4607.25 4607.25